function Star(username, singa) {
    this.username = username
    this.singa = singa
}
// Star.prototype.sing = function() {
//     console.log(
//         "sing"
//     );
// }

Star.prototype = {
    constructer: Star, //这样子直接覆盖掉了Star里面的全部构造函数，这样子可以使他重新指回CONSTRUCTER
    sing: function(username, singa) {
        console.log("sing" + this.username);
    },
    movie: function() {
        console.log("movie");
    }
}
let bba = new Star(afnf, fafsa)
console.log(Star.prototype.constructer);
console.log(bba.sing);